I have a Luner Fuel Pressuer Gauge in my car and I was wondering what it supposed to be reading at Idle and then Full Throttle. I have 42lb injectors, and at idle the pressure is around 27 to 30, and then full throttle around 42, I think. But I noticed the pressure needle will move up and down at steady throttle, shouldnt it stay at a steady pressure and spike up and down like that?? It spikes between like 27 to 30 psi, is this normal, or is something wrong, like with the gauge, or the fuel system or what???? Thanks for the help!!!! Jake